Sohieff



GALVANIG BATTERY.

' x. INVENTOR @chemisch/Le A UNITED STATES PATENT OFFICE.

ALEXANDER SCHANSCHIEFF, OF GIPSY HILL, COUNTY OF SURREY, ASSIG'NOR A TOTHE SCHANSCHIEFF ELECTRIC BATTERY SYNDICATE, OF LONDON,

ENGLAND.

GALVANIC BATTERY.

SPECIFICATION forming part of Letters Patent 180,379,911, dated March20, 1888.

Application tiled August 9, 1886. Serial No. 210,455. (No model.)Patented in England Octoberl, 1885, No. 12,378; in Germany December 25,1885, No. 36,415, and in India October 15, 1886, No. 177.

To all whom it may concern/.-V V

Be it known that I, ALEXANDER ScHAN- SOHIEFF, a subject of the Emperorof Russia, and residing at Gipsy Hill, in the county of Surrey, England,electrician, have invented certain new and useful Improvements inGalvanic Batteries, of which the following is a specification. v

The invention has already been patented to me in Great Britain October16, 1885, No.

12,378; in Germany December 25, 1885, No.

- sulphate of mercury taking place. I separate 36,415, and in IndiaOctober 15, 1886, No. 177.

In my improved battery Iemploy a solution of mercury combined withsulphuric acid, the mercury and sul phuric acid being so combined, forinstance, that five parts of water may hold in solution one part ofmetallic mercury, or thereabout.

In another application-a division of this case-No. 239,681', led May 28,1887, I have described and claimed such mercurial sulphuric acidcompound audits method of manufacture,which is as follows: Iadd threepounds of sulphuric acid, specific gravity 1.846, to two pounds ofmetallic mercury. I boil until the metal is converted into mercuriosulphate, and maintain the heat until the excess of acid is evaporatedand the salt is dry. When cold, I add one gallon (ten pounds) of water.This dissolves a part only, precipitation of basic the solid residue,and this I then again boil with sulphur-ic acid, as before, in theproportion of two parts of the residue to three parts of acid. Byboiling the residue is dissolved, and by continuing the heat the excessof acid is evaporated. I add the resulting mass, when cold, to theoriginal solution, and again I dissolve as much as the solution willtake up,and separate the residue. After three or four repe titions thewhole is dissolved in the original gallon of water. The densityof theliquid will then be about 1.425 Baume and the quantity about fivequarts. Finally I evaporate the liquid by heat until the electro-salt isdeposited in a solid crystalline state. I rake it out as it falls andpack it in closely-stoppered bottles, in which it may be kept for anindefinite time. When liquid is required for use in a `3H2O. Thesolution of this salt is of higher battery, I pour one gallon of wateron five 5o pounds of the salt. It dissolves perfectly,

leaving no residue; or, if' there be impurities which render the liquidturbid, it may be tilteredlthrough paper. The solution is then readyVfor use in a battery with Zinc and carbon or zinc platinum orplatinized tin, copper, or other metal elements.

I can produce the same salt by another process, as follows; but theprocess which I have. 3,

4already described is preferable: I dissolv' .6d

metallic mercury in sulphuric acid andke'vap orate off the excess ofacid, as already d scribed. When cold, I dissolve the salt in' threetimes its weight of water. Partial solution only, accompanied byprecipitation, takes place. l then add'strong sulphuricacid lit` tle bylittle, and finally' drop by drop. With constant agitation the solutionbecomes gradually more and more complete, until finally it is perceivedthat thedrop of sulphuric acid as it falls into the liquid produces aprecipitate. The process is then stopped and the solution cooled andltered. v This is then evaporated as already described, and yields in adry state the' novel saline material or electro-salt. The salt thusproduced consists of a combination of yellow basic sulphate of mercury(known as turbeth mneraw) with bisulphate of mercury, the formula being2HgO,SO,l-HgSO,-l

8o specific gravity than any mercurial salt heretofore produced.

The drawing merely shows a battery 'cup or cell having a central z incplate, Z, anda carbon plate, C, on each side thereof. Of course anysuitable electrodes, however arranged,may be used.

By employing the solution above mentioned a very useful and eficientsingle Huid-cell is produced. The electromotive force is high, and ityields a strong and cquable current, which can be maintained for hoursalmost without variation.

The battery is very simple, the only attention required being to fillthe cells when the battery is required, and to remove the'zinc plates.from the cell to economize the liquid when theA battery is not in use.

The mercury and' residue deposited in the sisting of acompound of yellowbasic sulphate m cells during use may be collected and reconof mercuryand bisulphate of mercury, having verted into liquid to be again used.substantial] y the formula specified, dissolved I disclaim herein anysubject-rnatter shown in water. 5 and claimed in my application N o.239,681, of ALEXANDER SCHANSOHIEFF.

May 28, 1887, above referred to. Witnesses:

` I claim as my nvention- JNO. DEAN,

The combination, with a galvanic-battery XVALTER J. SKERTEN,

cell and electrodes, of an exciting-Huid conl Both of 17 GracechurchStreet, London.`

